alleryA vehicle covers two fifths of a 10 km road at 20 km/h and the rest at 30 km/h. Average speed?
A25 km/h
B26 km/h
C28 km/h
D24 km/h
Answer & Solution
Correct answer: A. 25 km/h
4 km at 20 takes 0.2 h and 6 km at 30 takes 0.2 h, so 10 km in 0.4 h is 25 km/h.
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